Ascientific idea becomes valid when it is what?

What characteristic make legumes a good food source for food insecure populations

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.